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Need some help in solving the 2nd question. Image attached above

Need some help in solving the 2nd question. Image attached above

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Grade:11

2 Answers

sarvesh
26 Points
8 years ago
Is the answer √(147/3)?
Subhiksha
50 Points
8 years ago
Here’s my guess.
By law of Conservation of energy,
For A,
mg(30) + 0.5 mv12 = 0.5 mv2 ….….….….….….….…....(1)
For B,
mg(27) + 0.5 mv22 =0.5mv2….….….….….….….….…....(2)
 
where m is the mass of the discs, and v is thee common linear speed at B and D.
 
(2) -(1)
v22 =9+6g
So,
v2= 13 m/s

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